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Fuzzy Logic Based Multi-Dimensional Driving Decision-Making Model Involving Driving Styles Recognized from Naturalistic Driving Study

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ABSTRACT:Cognitive ability and decision-making process in the driving task vary among drivers. Individual differences on driver’s judgment as well as sensitivity to operational factors such as front gap and velocity differential affect driver’s decisions in driving. Based on fuzzy logic, which involves uncertainty and linguistic terms, this study develops a multi-dimensional decision-making model with driving personalities. Fuzzy sets are created to involve factors affecting driver’s car-following, lane-changing, cut-in and filtering decisions. Different from traditional decision-making models, 3 critical parameters are defined to represent drivers’ level of perception, sensitivity and risk-taking attitudes. The proposed model is then applied to recognize driving personalities of 30 drivers from Shanghai Naturalistic Driving Study. Critical parameters for each driver is calibrated to extract each driver’s driving personality. These critical parameters are then clustered in 6 groups. Each group’s driving styles are identified through analyses of their centroid, namely Neutral; Cautious; Aggressive; High Speed; Risk-affine and Risk-averse are identified. Safety performances of each driving style are evaluated under various traffic conditions through a car-following experiment. It is found in this study that when driver’s driving personalities are extracted from multiple levels, a driver’s perception and sensitivity level towards factors such as gap and velocity can be very different. A driver can be significantly less sensitive to a certain factor while he or she is normal towards other factors. The proposed model is found to be able to serve to better understand different driving styles and to provide long-term values of designing customized Advanced Driver Assistant System (ADAS) system according to user’s driving style.

Chen Chai, Xuesong Wang*, Yiik Diew Wong. Fuzzy Logic Based Multi-Dimensional Driving Decision-Making Model Involving Driving Styles Recognized from Naturalistic Driving Study. Transportation Research Board 97th Annual Meeting, Washington D.C., USA, 2018. 1.7-11.

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